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A color picker dialog with a color dropper like Photoshop and Frontpage 2000

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23 Jan 20022 min read 94.9K   4.3K   29  
A color picker and dropper that extends the standard Windows dialogs to behave like Photoshop or Frontpage 2000
 
// Copyright UCanCode Software Technology Inc, All Rights Reserved
// You can contact us.
// Support@UCanCode.net
// http://www.ucancode.net
/********************************************************************/
// FOColorDialog.cpp : implementation file
//

#include "stdafx.h"
#include "resource.h"
#include "FOColorDialog.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CFOColorDialog dialog


CFOColorDialog::CFOColorDialog(CWnd* pParent /*=NULL*/)
	: CDialog(CFOColorDialog::IDD, pParent)
{
	//{{AFX_DATA_INIT(CFOColorDialog)
	m_strValue = _T("");
	//}}AFX_DATA_INIT
	m_bCapturing = FALSE;
	crColor = RGB(255,255,255);
	m_bPalette = TRUE;
}


void CFOColorDialog::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CFOColorDialog)
	DDX_Control(pDX, IDC_NEWVERSION, m_newVersion);
	//}}AFX_DATA_MAP
}


BEGIN_MESSAGE_MAP(CFOColorDialog, CDialog)
	//{{AFX_MSG_MAP(CFOColorDialog)
	ON_WM_DESTROY()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_BN_CLICKED(IDC_FO_COLOR_CUSTOM, OnFoColorCustom)
	ON_WM_SYSCOLORCHANGE()
	ON_WM_QUERYNEWPALETTE()
	ON_WM_PALETTECHANGED()
	//}}AFX_MSG_MAP
ON_MESSAGE(WM_FO_SELECTCOLOROK, OnSelectDayOK)
ON_MESSAGE(WM_FO_SELECTCOLORCUSTOM, OnSelectCustom)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CFOColorDialog message handlers

BOOL CFOColorDialog::OnInitDialog() 
{
	CDialog::OnInitDialog();
	
	// TODO: Add extra initialization here
	if (gfxData.m_nBitsPerPixel < 8)	// 16 colors, call standard dialog
	{
		CColorDialog dlg (crColor, CC_FULLOPEN | CC_ANYCOLOR);
		int nResult = dlg.DoModal ();
		crColor = dlg.GetColor ();
		EndDialog (nResult);

		return TRUE;
	}
	m_staticColor.AttachStatic(IDC_FO_SELECTCOLOR,this);
	m_staticColor.InsertImage(IDB_FO_COLOR_BITMAP,-1,RGB(255,255,255));
	m_newVersion.SetURL(_T("http://www.ucancode.net/"));
	
	CRect theRect;
	GetDlgItem(IDC_FO_COLORS)->GetWindowRect( &theRect );
	ScreenToClient(&theRect);	
	m_wndColor.Create(WS_CHILD|WS_VISIBLE,theRect, this,4232,RGB(255,255,255));
	m_wndColor.GetColorControl()->SetBorderType(BORDER_ETCHED);
	m_wndColor.GetColorControl()->SetCustomBar(FALSE);
	m_wndColor.GetColorControl()->InitColorPalette();

	m_btnColor.Attach(IDC_FO_BUTTON_PREVIEW,this);

	m_wndColor.GetColorControl()->SetRGB(crColor);
	m_btnColor.SetButtonColor(crColor);
	m_btnColor.SetOldColor(crColor);
	CString strValue;
	strValue.Format("%u,%u,%u",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
	GetDlgItem(IDC_FO_COLOR_VALUE)->SetWindowText(strValue);

	strValue.Format("%02X%02X%02X",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
	GetDlgItem(IDC_FO_COLOR_HEX_VALUE)->SetWindowText(strValue);

	CWinApp* pApp = AfxGetApp();
	ASSERT(pApp);
	if (pApp)
	{
		m_hCursor = pApp->LoadCursor(IDC_FO_SELECTCOLOR_CURSOR);
	}
	return TRUE; 
}

LONG CFOColorDialog::OnSelectDayOK(UINT wParam, LONG lParam)
{
	lParam;
	COLORREF crNewColor = (COLORREF) wParam;
	m_btnColor.SetButtonColor(crNewColor);
	SetColor(crNewColor);
	CString strValue;
	strValue.Format("%u,%u,%u",GetRValue(crNewColor),GetGValue(crNewColor),GetBValue(crNewColor));
	GetDlgItem(IDC_FO_COLOR_VALUE)->SetWindowText(strValue);
	
	strValue.Format("%02X%02X%02X",GetRValue(crNewColor),GetGValue(crNewColor),GetBValue(crNewColor));
	GetDlgItem(IDC_FO_COLOR_HEX_VALUE)->SetWindowText(strValue);

	return 0L;
}

LONG CFOColorDialog::OnSelectCustom(UINT wParam, LONG lParam)
{
	wParam;
	lParam;
	CColorDialog dlg(m_wndColor.GetColorControl()->GetRGB(), CC_FULLOPEN | CC_ANYCOLOR);
	if(dlg.DoModal() == IDOK)
	{
		m_wndColor.GetColorControl()->SetRGB(dlg.GetColor());
		m_btnColor.SetButtonColor(dlg.GetColor());
		m_wndColor.GetColorControl()->UpdateCustom();
		SetColor(dlg.GetColor());
		CString strValue;
		strValue.Format("%u,%u,%u",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_VALUE)->SetWindowText(strValue);
		
		strValue.Format("%02X%02X%02X",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_HEX_VALUE)->SetWindowText(strValue);
	}
	return 0L;
}

void CFOColorDialog::StopCapture()
{
	if (m_bCapturing)
	{
		ReleaseCapture();
		m_bCapturing = FALSE;

		SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW));
	}
}
BOOL CFOColorDialog::PreTranslateMessage(MSG* pMsg) 
{
	BOOL bHandledMsg = FALSE;

	switch (pMsg->message)
	{                      
		case WM_KEYDOWN:
		{
			switch (pMsg->wParam)
			{
				// hitting escape while searching for password edits
				// should only stop the search for password edits and 
				// not kill app 
				case VK_ESCAPE:
					if (m_bCapturing)
					{
						StopCapture();
						bHandledMsg = TRUE;
					}
				break;
				
				default: break;
			} // switch (pMsg->wParam)
		}
		break;
		
		default: break;			
	} // switch (pMsg->message)                  

	return (bHandledMsg ? TRUE : CDialog::PreTranslateMessage(pMsg));
}

void CFOColorDialog::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CWnd* pWnd = ChildWindowFromPoint(point);
	if (pWnd  && pWnd->GetSafeHwnd() == m_staticColor.GetSafeHwnd())
	{
		SetCapture();
		SetCursor(m_hCursor);

		m_bCapturing = TRUE;
	}

	CDialog::OnLButtonDown(nFlags, point);
}

void CFOColorDialog::OnLButtonUp(UINT nFlags, CPoint point) 
{
	nFlags;
	point;
	if (m_bCapturing)
	{
		StopCapture();
	}
}

void CFOColorDialog::OnMouseMove(UINT nFlags, CPoint point) 
{
	if (m_bCapturing)
	{
		ClientToScreen(&point);
		HDC hScreenDC = ::GetDC(NULL);			
		crColor = ::GetPixel(hScreenDC,point.x,point.y);
		m_btnColor.SetButtonColor(crColor);
		m_wndColor.GetColorControl()->SetRGB(crColor);
		CString strValue;
		strValue.Format("%u,%u,%u",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_VALUE)->SetWindowText(strValue);
		
		strValue.Format("%02X%02X%02X",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_HEX_VALUE)->SetWindowText(strValue);
		::ReleaseDC(NULL,hScreenDC);

		UpdateData(FALSE);
	}

	CDialog::OnMouseMove(nFlags, point);
}

void CFOColorDialog::OnDestroy() 
{
	if(m_Palette.GetSafeHandle()!=NULL)
		m_Palette.DeleteObject();
	CDialog::OnDestroy();
}

void CFOColorDialog::OnFoColorCustom() 
{
	// TODO: Add your control notification handler code here
	CColorDialog dlg(GetColor(), CC_FULLOPEN | CC_ANYCOLOR);
	if(dlg.DoModal() == IDOK)
	{
		m_wndColor.GetColorControl()->SetRGB(dlg.GetColor());
		m_btnColor.SetButtonColor(dlg.GetColor());
		SetColor(dlg.GetColor());
		CString strValue;
		strValue.Format("%u,%u,%u",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_VALUE)->SetWindowText(strValue);
		
		strValue.Format("%02X%02X%02X",GetRValue(crColor),GetGValue(crColor),GetBValue(crColor));
		GetDlgItem(IDC_FO_COLOR_HEX_VALUE)->SetWindowText(strValue);
	}
}

void CFOColorDialog::OnSysColorChange() 
{
	CDialog::OnSysColorChange();

	gfxData.OnSysColorChange();
	
	if (m_bPalette)
	{
		if (gfxData.m_nBitsPerPixel < 8)
		{
			ShowWindow (SW_HIDE);

			CColorDialog dlg (crColor, CC_FULLOPEN | CC_ANYCOLOR);
			int nResult = dlg.DoModal ();
			crColor = dlg.GetColor ();
			EndDialog (nResult);
		}
		else
		{
			CreatePalette();
			Invalidate();
			UpdateWindow();
		}
	}
}

void CFOColorDialog::CreatePalette(BOOL bRedraw)
{
	bRedraw;
	// Create palette:
	CPaintDC dc (this);

	CDC *pDC = &dc;
	
	if(pDC->GetDeviceCaps(RASTERCAPS) & RC_PALETTE)
	{
		LOGPALETTE *pPal=(LOGPALETTE *)new unsigned char[sizeof(LOGPALETTE)+257*sizeof(PALETTEENTRY)];
	
		pPal->palVersion=0x300;
		pPal->palNumEntries=256;

		for(int i=0;i<256;i++)
		{
			pPal->palPalEntry[i].peRed=(unsigned char)(255 * (i & 0x07) / 7 );
			pPal->palPalEntry[i].peGreen=(unsigned char)(255 * ((i >> 3) & 0x07)/ 7 );
			pPal->palPalEntry[i].peBlue=(unsigned char)(255 * ((i >> 6) & 0x03) / 3 );
			pPal->palPalEntry[i].peFlags = 0;
		}

		m_Palette.CreatePalette(pPal);//Halftone

		pDC->SelectPalette(&m_Palette,FALSE);
		pDC->RealizePalette();

		delete pPal;
	}
}

BOOL CFOColorDialog::OnQueryNewPalette() 
{
	if(m_Palette.GetSafeHandle()!=NULL)
	{
		CPaintDC dc(this);
		CDC *pDC=&dc;
		CPalette *pOldPal=(CPalette *)pDC->SelectPalette(&m_Palette,FALSE);
		pDC->RealizePalette();
		pDC->SelectPalette(pOldPal,FALSE);
		return TRUE;
	}
	return CWnd::OnQueryNewPalette();
}


void CFOColorDialog::OnPaletteChanged(CWnd* pFocusWnd) 
{
	if(pFocusWnd==this)
		return;

	if(m_Palette.GetSafeHandle()!=NULL)
	{
		CPaintDC dc(this);
		CDC *pDC=&dc;
		CPalette *pOldPal=(CPalette *)pDC->SelectPalette(&m_Palette,FALSE);
		pDC->RealizePalette();
		pDC->SelectPalette(pOldPal,FALSE);
	}
	
}

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Written By
jack Mesic
Web Developer
United States United States
jack Mesic is the president of UCanCode Software Technology,Inc..

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Layout: fixed | fluid

Posted 22 Jan 2002

Article Copyright 2002 by jack Mesic
Everything else Copyright © CodeProject, 1999-2024

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